Subject: How is a sarcodine protozoan different from other protozoans

I have been assigned the task of defining a sarcodine as it relates to 
protozoa's.  I have found the word spelled as sarcodine and sacrodine; so I 
do not know which is correct.  My scientist teacher wants me to research 
and explain what it is; but I have been unable to find any reference to it 
in your library or on the numerous sites you reference.  I've looked under 
both spellings, rhizopoda, protozoa - still nothing anywhere. I've even 
tried several of the other Ask Scientist sites in CN, UK and around the US. 
 Again have found nothing. I'll be happy to research on my own, but would 
appreciate some direction as to where I might find this information.  My 
mother works late and so we cannot get to the library until the weekends.  
Any help you can provide would be greatly appreciated.

Re: How is a sarcodine protozoan different from other protozoans